package main

import "fmt"

func main() {
  fmt.Println("请输入星期数字：")
  var week int
  fmt.Scan(&week)

  switch week {
  case 1:
    fmt.Println("周一")
  case 2:
    fmt.Println("周二")
  case 3:
    fmt.Println("周三")
  case 4:
    fmt.Println("周四")
  case 5:
    fmt.Println("周五")
  case 6, 7:
    fmt.Println("周末")
  default:
    fmt.Println("错误")
  }
}